1251510351941 has 2 divisors, whose sum is σ = 1251510351942. Its totient is φ = 1251510351940.

The previous prime is 1251510351913. The next prime is 1251510352003. The reversal of 1251510351941 is 1491530151521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1170390767716 + 81119584225 = 1081846^2 + 284815^2 .

It is an emirp because it is prime and its reverse (1491530151521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251510351941 is a prime.

It is a super-2 number, since 2×1251510351941² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1251510351895 and 1251510351904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251510351911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625755175970 + 625755175971.

It is an arithmetic number, because the mean of its divisors is an integer number (625755175971).

Almost surely, 2^{1251510351941} is an apocalyptic number.

It is an amenable number.

1251510351941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251510351941 is an equidigital number, since it uses as much as digits as its factorization.

1251510351941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1251510351941 in words is "one trillion, two hundred fifty-one billion, five hundred ten million, three hundred fifty-one thousand, nine hundred forty-one".